edge 80 lens flare problems

I have a Nikon D600 and the composer pro.With the edge 80 there are a lot of lens flare problems even shooting during cloudy days. I tried to put a UV and a polarized filter and even a lens hood but no changes so far. I don't have any problems with the double glass optic.
On the picture I sent, you can see the center of the image being affected at different apertures.
Any idea how to fix that? Is it possible that the my edge 80 is not working properly?